ACTIVE AND PASSIVE SURFACE WAVE TECHNIQUES

1151 Pomona Road, Corona, California 92882 ph. 951-549-1234 fx 951-549-1236 Accelerated Weight Drop ACTIVE AND PASSIVE SURFACE WAVE TECHNIQUES Overview ACTIVE and PASSIVE SURFACE wave TECHNIQUES are relatively new in-situ seismic methods for determining shear wave velocity (VS) profiles. Testing is performed on the ground SURFACE , allowing for less costly measurements than with traditional borehole methods. The basis of SURFACE wave TECHNIQUES is the dispersive characteristic of Rayleigh waves when traveling through a layered medium. Rayleigh wave velocity is determined by the material properties (primarily shear wave velocity, but also to a lesser degree compression wave velocity and material density) of the subsurface to a depth of approximately 1 to 2 wavelengths.

Triangle Array Geometry Dispersion Curve from Array Microtremor Measurements Refraction Microtremor Array Layout Wavefield Transform of REMI Data

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  Surfaces, Active, Technique, Waves, Passive, Active and passive surface wave techniques

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